Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: HELP Friction on Ice involving weight

  1. Oct 1, 2007 #1
    You are driving a 2580.0 kg car at a constant speed of 14.0 m/s along an icy, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 26.4 m. What is the coefficient of kinetic friction between your tires and the icy road.

    3. The attempt at a solution
    I found the acceleration to be -.5303 by taking -14/26.4 (v=v0+at) but now I'm confused as how to find the kinetic friction by stopping
  2. jcsd
  3. Oct 1, 2007 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    Find the acceleration or deceleration, then

    a/g = [itex]\mu[/itex], since Ffriction = ma = [itex]\mu[/itex] W = [itex]\mu[/itex]mg.
  4. Oct 1, 2007 #3
    im sorry man still not getting it, is there some sort of website that has all the equations on it?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook